Sigma demos WR Ceramic lens filter strength with impact test

In a newly released video, Sigma tests the strength of its protective ceramic lens filters in an impact test. Putting claims of toughness to the test, the video shows a 49g / 1.7oz metal ball dropped from a height of about 1.3m / 4ft onto the WR Ceramic Protector as well as three competing lens filters. While the ceramic protector survives unscathed, the competition isn't so lucky. In addition to its WR Ceramic Protector, the video features a 'conventional protector,' 'Brand A Chemically ...